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Alternating current and direct current multi-port power distribution system for office and residential parks

A power distribution system, AC and DC technology, applied in the field of power distribution network, can solve problems such as high cost, reduced reliability, and increased system complexity, and achieve the effects of reducing energy waste, reducing installation costs, and improving electricity flexibility.

Pending Publication Date: 2022-01-04
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this solution, a power switch array needs to be used to reconfigure the function of the H-bridge converter to realize DC-DC, DC-AC and AC-DC conversion. A large number of power switches used to improve flexibility lead to an increase in system complexity. The cost is too high and the reliability is reduced, it is difficult to meet the actual application requirements

Method used

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  • Alternating current and direct current multi-port power distribution system for office and residential parks
  • Alternating current and direct current multi-port power distribution system for office and residential parks
  • Alternating current and direct current multi-port power distribution system for office and residential parks

Examples

Experimental program
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Effect test

Embodiment 1

[0029] This embodiment provides an AC / DC multi-port power distribution system 100 for supplying power to office and residential parks.

[0030] figure 1 It is an overall block diagram of the AC / DC multi-port power distribution system in Embodiment 1 of the present invention.

[0031] like figure 1 As shown, the AC-DC multi-port power distribution system 100 includes a 10KV AC power supply 10, a power frequency transformer 20, a DC load module 30, an energy module 40, a converter module 50, a set of AC-DC conversion circuits 60, and an AC load module 70 . Two first DC bus bars 80 and two second DC bus bars 90 .

[0032] The power frequency transformer 20 is a three-phase three-column type, and is set in one-to-one correspondence with the AC power supply 10 . The high voltage side of the industrial frequency transformer 20 is connected to the AC power source 10 in a delta connection, the low voltage side is connected to three single-phase independent windings, and the low volta...

Embodiment 2

[0047] This embodiment provides an AC and DC multi-port power distribution system 200 .

[0048] Figure 4 It is an overall block diagram of the AC / DC multi-port power distribution system in Embodiment 2 of the present invention.

[0049] like Figure 4 As shown, the structure of the system in this embodiment is basically the same as that in Embodiment 1, the difference is that the DC sides of the three-phase H-bridge converters in this embodiment are cascaded together to form four first DC buses . The voltage between two adjacent first busbars is 375V.

[0050] The specific implementation of the AC and DC multi-port power distribution system 200 is as follows:

[0051] The 10kV AC voltage side is the incoming line of the grid power supply, which is directly connected to the high-voltage side of the power frequency transformer. The power frequency transformer is a three-phase three-column type. The outlet terminal of AC 220V can be drawn to connect to the load of AC 220V....

Embodiment 3

[0053] This embodiment provides an AC / DC multi-port power distribution system 300 .

[0054] Figure 5 It is an overall block diagram of the AC / DC multi-port power distribution system in Embodiment 3 of the present invention.

[0055] like Figure 5 As shown, the system structure of this embodiment is basically the same as the system structure of Embodiment 1, the difference is that the DC sides of the three-phase H-bridge converters of this embodiment are cascaded together to form a ±375V DC+\DC0\ Three first DC buses 80 of DC-. The number of AC-DC conversion circuits 60 is two groups. The AC load module 70 has two AC load ports. Both charging converters are DC / DC converters.

[0056] The specific implementation of the AC and DC multi-port power distribution system 300 is as follows:

[0057]The 10kV AC voltage side is the incoming line of the grid power supply, which is directly connected to the high-voltage side of the industrial frequency transformer. They all adopt...

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Abstract

The invention belongs to the technical field of power distribution networks, and particularly relates to an alternating current and direct current multi-port power distribution system for office and residential parks. The alternating current and direct current multi-port power distribution system for office and residential parks comprises an alternating current power supply, an industrial frequency transformer, at least one group of alternating current and direct current conversion circuits, a plurality of first direct current buses, two second direct current buses, a converter module, a direct current load module, and an alternating current load module, which together form an alternating current and direct current hybrid distribution network system with multi-voltage level output. The alternating current and direct current hybrid power distribution network system overcomes the technical problems of high energy conversion loss, high system cost, low reliability, low on-site energy consumption rate and poor power utilization flexibility in the prior art. The alternating current and direct current hybrid power distribution network system can effectively reduce energy waste, improve power utilization flexibility and achieve on-site consumption of distributed energy, and has the advantages of being high in reliability and low in cost.

Description

technical field [0001] The invention belongs to the technical field of power distribution network, and in particular relates to an AC and DC multi-port power distribution system for office and residential parks. Background technique [0002] In recent years, with the rapid development of social economy and the rapid construction of modern cities, the size and variety of loads in urban distribution networks have been increasing, and traditional AC distribution networks are facing many new problems. The traditional AC distribution incoming line power supply is 10kV power supply, and the three-phase four-wire 380V low-voltage AC power is obtained through the distribution transformer, and then supplied to the power load through the AC 220V distribution network. On the one hand, the rapid growth of the city scale has led to the continuous expansion of the power supply range of the urban distribution network, which makes the traditional distribution network face the problems of in...

Claims

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Application Information

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IPC IPC(8): H02J5/00H02M3/335H02M5/12
CPCH02J5/00H02M3/3353H02M5/12
Inventor 李锦焦娜娜党恩帅范雨顺
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER